Update: 1.2

Changes:

• Music has been added! I used the song 'Space' by @gruber_music, which is part of his Pico-8 Tunes Volume 1
• Added screen shake!
• Tweaked the asteroid velocity to stop them always drifting to the right.
• Tweaked the asteroid velocity so that the smaller they are, the faster they go.

If you encounter any bugs, I would appreciate it if you could leave a comment here, or on my twitter: @josh_kit_games